Bedding structure controls rainfall runoff in mountain catchments

Researchers at the University of Tsukuba have discovered that rainwater runoff in the highly rugged sedimentary rock mountains of Japan's Southern Alps is governed by two processes: "deep infiltration" and "shallow drainage via landslides." These processes are dictated by the inclination of geological strata. Based on these findings, the researchers propose a conceptual framework, termed the "structural ground system," to explain how the bedding structure regulates rainwater runoff.